Enrichment of trace levels of cadmium in vegetable materials by flame atomic absorption spectrometry has been carried out using anthranilic acid on activated carbon at pH 7. Up to hundred fold enrichment has been achieved by this reagent. Interferences due to matrix components are minimized by their addition at higher level to the standards and blank. Calibration curve is linear in 1–7 ppb range of cadmium. The relative standard deviation for 7 ppb of cadmium is found to be 3.5%. The observed cadmium level in root vegetables is 0.09-0.20ppm.
SHAHIDA B NIAZI ,M YOUNAS KHOKHAR ,RANA LIAQAT ALI ,F MAHMOOD ,
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